Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 94 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

94 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
May 28, 2024 MTX S 11,958 $84.36 $1,008,777 35,864 Direct -25.01% Disposed -21.3% (price as of 2026-10-02)
Dec. 7, 2023 MTX S 4,818 $63.36 $305,268 34,040 Direct -12.40% Disposed 4.8% (price as of 2026-10-02)
Aug. 11, 2022 MTX S 6,356 $64.27 $408,500 32,286 Direct -16.45% Disposed 3.4% (price as of 2026-10-02)
Feb. 24, 2021 MTX S 6,246 $72.36 $451,961 30,374 Direct -17.06% Disposed -8.2% (price as of 2026-10-02)
Nov. 10, 2020 MTX S 5,992 $62.63 $375,279 28,225 Direct -17.51% Disposed 6.1% (price as of 2026-10-02)
Dec. 9, 2019 MTX S 7,380 $54.70 $403,686 26,278 Direct -21.93% Disposed 21.4% (price as of 2026-10-02)

Showing latest 100 of 308 transactions

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
Jan. 26, 2026 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,292) · · 1,292 Disposed
Jan. 23, 2026 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,427) · · 1,427 Disposed
Jan. 21, 2026 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,290) · · 1,290 Disposed
Jan. 20, 2026 MTX Employee Stock Option (Right to Buy) Common Stock (3,966) $66.23 Jan. 20, 2036 3,966 Acquired
Jan. 20, 2026 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (4,618) · · 4,618 Acquired
Jan. 27, 2025 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,176) · · 1,176 Disposed
Jan. 24, 2025 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,293) · · 1,293 Disposed
Jan. 23, 2025 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,427) · · 1,427 Disposed
Jan. 21, 2025 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (3,869) · · 3,869 Acquired
Jan. 21, 2025 MTX Employee Stock Option (Right to Buy) Common Stock (3,323) $76.75 Jan. 21, 2035 3,323 Acquired
May 28, 2024 MTX Employee Stock Option (Right to Buy) Common Stock (4,556) $60.18 Jan. 20, 2025 4,556 Disposed
May 28, 2024 MTX Employee Stock Option (Right to Buy) Common Stock (7,402) $38.28 Jan. 19, 2026 7,402 Disposed
Jan. 26, 2024 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (378) · · 378 Disposed
Jan. 26, 2024 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,100) · · 1,100 Disposed
Jan. 25, 2024 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,177) · · 1,177 Disposed
Jan. 24, 2024 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,293) · · 1,293 Disposed
Jan. 23, 2024 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (4,280) · · 4,280 Acquired
Jan. 23, 2024 MTX Employee Stock Option (Right to Buy) Common Stock (3,676) $66.72 Jan. 23, 2034 3,676 Acquired
Dec. 7, 2023 MTX Employee Stock Option (Right to Buy) Common Stock (4,818) $57.96 Jan. 22, 2024 4,818 Disposed
Jan. 26, 2023 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,480) · · 1,480 Disposed
Jan. 25, 2023 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,177) · · 1,177 Disposed
Jan. 24, 2023 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (3,878) · · 3,878 Acquired
Jan. 24, 2023 MTX Employee Stock Option (Right to Buy) Common Stock (6,662) $66.08 Jan. 24, 2033 6,662 Acquired
Jan. 23, 2023 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,129) · · 1,129 Disposed
Aug. 11, 2022 MTX Employee Stock Option (Right to Buy) Common Stock (6,356) $41.29 Jan. 22, 2023 6,356 Disposed
Jan. 26, 2022 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,480) · · 1,480 Disposed
Jan. 25, 2022 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (3,530) · · 3,530 Acquired
Jan. 25, 2022 MTX Employee Stock Option (Right to Buy) Common Stock (6,063) $69.81 Jan. 25, 2032 6,063 Acquired
Jan. 22, 2022 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,467) · · 1,467 Disposed
Jan. 21, 2022 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,129) · · 1,129 Disposed
Feb. 24, 2021 MTX Employee Stock Option (Right to Buy) Common Stock (6,746) $32.03 Jan. 25, 2022 6,746 Disposed
Jan. 26, 2021 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (4,438) · · 4,438 Acquired
Jan. 26, 2021 MTX Employee Stock Option (Right to Buy) Common Stock (5,671) $66.00 Jan. 26, 2031 5,671 Acquired
Jan. 23, 2021 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (803) · · 803 Disposed
Jan. 22, 2021 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,467) · · 1,467 Disposed
Jan. 21, 2021 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,129) · · 1,129 Disposed
Nov. 10, 2020 MTX Employee Stock Option (Right to Buy) Common Stock (6,492) $32.23 Jan. 26, 2021 6,492 Disposed
Jan. 23, 2020 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (803) · · 803 Disposed
Jan. 22, 2020 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,468) · · 1,468 Disposed
Jan. 21, 2020 MTX Employee Stock Option (Right to Buy) Common Stock (5,817) $57.66 Jan. 21, 2030 5,817 Acquired
Jan. 21, 2020 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (3,387) · · 3,387 Acquired
Jan. 17, 2020 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (744) · · 744 Disposed
Dec. 9, 2019 MTX Employee Stock Option (Right to Buy) Common Stock (7,380) $24.56 Jan. 27, 2020 7,380 Disposed
Jan. 23, 2019 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (803) · · 803 Disposed
Jan. 22, 2019 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (3,483) · · 3,483 Acquired
Jan. 22, 2019 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (919) · · 919 Acquired
Jan. 22, 2019 MTX Employee Stock Option (Right to Buy) Common Stock (5,983) $54.44 Jan. 22, 2029 5,983 Acquired
Jan. 19, 2019 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,428) · · 1,428 Disposed
Jan. 17, 2019 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (745) · · 745 Disposed
Jan. 24, 2018 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (2,409) · · 2,409 Acquired
Jan. 23, 2018 MTX Employee Stock Option (Right to Buy) Common Stock (4,138) $76.38 Jan. 23, 2028 4,138 Acquired
Jan. 20, 2018 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,418) · · 1,418 Disposed
Jan. 19, 2018 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,428) · · 1,428 Disposed
Jan. 17, 2018 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (745) · · 745 Disposed
Jan. 22, 2017 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (836) · · 836 Disposed
Jan. 20, 2017 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,418) · · 1,418 Disposed
Jan. 19, 2017 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,428) · · 1,428 Disposed
Jan. 17, 2017 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (2,234) · · 2,234 Acquired
Jan. 17, 2017 MTX Employee Stock Option (Right to Buy) Common Stock (3,837) $78.03 Jan. 17, 2027 3,837 Acquired
Aug. 9, 2016 MTX Employee Stock Option (Right to Buy) Common Stock (5,000) $30.78 Feb. 28, 2017 5,000 Disposed
Aug. 9, 2016 MTX Employee Stock Option (Right to Buy) Common Stock (6,000) $32.08 Feb. 27, 2018 6,000 Disposed
Feb. 16, 2016 MTX Employee Stock Option (Right to Buy) Common Stock (170) $27.11 Feb. 22, 2016 170 Disposed
Jan. 22, 2016 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,102) · · 1,102 Disposed
Jan. 22, 2016 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (836) · · 836 Disposed
Jan. 20, 2016 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,418) · · 1,418 Disposed
Jan. 19, 2016 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (4,284) · · 4,284 Acquired
Jan. 19, 2016 MTX Employee Stock Option (Right to Buy) Common Stock (7,402) $38.28 Jan. 19, 2026 7,402 Acquired
Jan. 22, 2015 MTX Deferred Restricted Stock Units (DRSU) Common Stock (836) · · 836 Disposed
Jan. 20, 2015 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (4,254) · · 4,254 Acquired
Jan. 20, 2015 MTX Employee Stock Option (Right to Buy) Common Stock (4,556) $60.18 Jan. 20, 2025 4,556 Acquired
Dec. 22, 2014 MTX Employee Stock Option (Right to Buy) Common Stock (96) $30.97 Feb. 23, 2015 96 Disposed
Jan. 27, 2014 MTX Deferred Restricted Stock Units (DRSU) Common Stock (1,268) · · 1,268 Disposed
Jan. 27, 2014 MTX Deferred Restricted Stock Units (DRSU) Common Stock (1,352) · · 1,352 Disposed
Jan. 25, 2014 MTX Deferred Restricted Stock Units (DRSU) Common Stock (1,352) · · 1,352 Disposed
Jan. 22, 2014 MTX Deferred Restricted Stock Units (DRSU) Common Stock (1,102) · · 1,102 Disposed
Jan. 22, 2014 MTX Employee Stock Option (Right to Buy) Common Stock (4,818) $57.96 Jan. 22, 2024 4,818 Acquired
Jan. 22, 2014 MTX Deferred Restricted Stock Units ("DRSUs") Common Stock (2,508) · · 2,508 Acquired
Jan. 22, 2014 MTX Deferred Restricted Stock Units (DRSU) Common Stock (1,102) · · 1,102 Disposed
Feb. 11, 2013 MTX Employee Stock Option (Right to Buy) Common Stock (2,704) $30.97 Feb. 23, 2015 2,704 Disposed
Jan. 28, 2013 MTX DRSUs Common Stock (1,440) · · 1,440 Disposed
Jan. 28, 2013 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,268) · · 1,268 Disposed
Jan. 25, 2013 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (1,354) · · 1,354 Acquired
Jan. 22, 2013 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (3,306) · · 3,306 Acquired
Jan. 22, 2013 MTX Employee Stock Option (Right to Buy) Common Stock (6,356) $41.29 Jan. 22, 2023 6,356 Acquired
Feb. 14, 2012 MTX Employee Stock Option (Right to Buy) Common Stock (3,000) $39.71 Jan. 28, 2019 3,000 Disposed
Feb. 14, 2012 MTX Employee Stock Option (Right to Buy) Common Stock (2,300) $53.89 Feb. 25, 2014 2,300 Disposed
Feb. 14, 2012 MTX Employee Stock Option (Right to Buy) Common Stock (584) $49.12 July 1, 2013 584 Disposed
Feb. 14, 2012 MTX Employee Stock Option (Right to Buy) Common Stock (1,416) $49.12 July 1, 2013 1,416 Disposed
Feb. 11, 2012 MTX Employee Stock Option (Right to Buy) Common Stock (3,630) $27.11 Feb. 22, 2016 3,630 Disposed
Jan. 28, 2012 MTX Deferred Rrestricted Stock Units (DRSUs) Common Stock (900) · · 900 Disposed
Jan. 27, 2012 MTX Deferred Rrestricted Stock Units (DRSUs) Common Stock (720) · · 720 Disposed
Jan. 26, 2012 MTX Deferred Rrestricted Stock Units (DRSUs) Common Stock (634) · · 634 Disposed
Jan. 25, 2012 MTX Deferred Restricted Stock Units (DRSU) Common Stock (2,029) · · 2,029 Acquired
Jan. 25, 2012 MTX Employee Stock Option (Right to Buy) Common Stock (3,373) $64.06 Jan. 25, 2022 3,373 Acquired
Dec. 16, 2011 MTX Employee Stock Option (Right to Buy) Common Stock (566) $46.63 Jan. 24, 2012 566 Disposed
Feb. 27, 2011 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (566) · · 566 Disposed
Jan. 28, 2011 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (900) · · 900 Disposed
Jan. 27, 2011 MTX Deferred Restricted Stock Units (DRSUs) Common Stock (720) · · 720 Disposed
Jan. 26, 2011 MTX Deferred Restricted Stock Units ("DRSUs") Common Stock (1,902) · · 1,902 Acquired
Jan. 26, 2011 MTX Employee Stock Option (Right to Buy) Common Stock (3,246) $64.46 Jan. 26, 2021 3,246 Acquired

Showing latest 100 of 135 transactions

Exercise/conversion price is blank when not applicable (e.g. RSUs).